W. R. Grace Co.

David E Kramm

Charles R Morgan

Joseph Donald Moyer

Arthur D Ketley

This invention relates to an ethylenically unsaturated reactive thixotropic agent for use in radiation curable compositions, e.g., overprint varnishes, formed by reacting a hydroxyl-containing fatty acid ester with an ethylenically unsaturated isocyanate. The agent not only performs its thixotropic function in the uncured state but also forms part of the cured product on exposure to radiation, e.g., UV radiation due to its substantially similar reactivity.

Radiation curable, ethylenically unsaturated thixotropic agent and

This invention is directed to novel halogen-containing polythiols which impart improved flame retardancy to radiation cured thiol-ene compositions.

Flame retardant mercaptocarboxylic acid esters of halogenated polyols

This invention relates to compositions of the formula: ##STR1## wherein n is 0 to 2 and at least 1 and not more than 2n + 2 of the A groups are ester radicals of the structure ##STR2## wherein R is a straight chain or branched, saturated or unsaturated hydrocarbon radical containing 11 to 19 carbon atoms and at least 2 and not more than 2n + 3 of the A groups are ester radicals of the structure ##STR3## wherein m is 0 to 1. The composition is formed by reacting one mole of a mono, di- or tri-pentaerythritol of the formula: ##STR4## WHEREIN N IS 0-2 WITH 2N + 4 MOLES OF A MIXTURE OF MONOCARBOXYLIC ACIDS FROM THE GROUP CONSISTING OF (A) AT LEAST 1 AND NOT MORE THAN 2N + 2 MOLES OF RCOOH wherein R is a straight chain or branched, saturated or unsaturated hydrocarbon radical containing 11 to 19 carbon atoms and (b) at least 2 and not more than 2n + 3 of HSCH.sub.2 (CH.sub.2).sub.m COOH wherein m is 0 to 1. In the present invention it is preferred to react only one acid from each of the mercapto and the long chain fatty acid group members. However, more than one acid from each group member can be reacted if desired.

Pentaerythritol esters of mercapto acids plus long chain fatty acids

Flame retardant mercaptocarboxylic acid esters of halogenated aromatic

This invention relates to compositions of the formula: ##STR1## WHEREIN N IS 0 TO 2 AND AT LEAST 1 AND NOT MORE THAN 2N + 2 OF THE A groups are ester radicals of the structure ##STR2## wherein R is a straight chain or branched, saturated or unsaturated hydrocarbon radical containing 11 to 19 carbon atoms and at least 2 and not more than 2n + 3 of the A groups are ester radicals of the structure ##STR3## wherein m is 0 to 1. The composition is formed by reacting one mole of a mono, di- or tri-pentaerythritol of the formula: ##STR4## WHEREIN N IS 0-2 WITH 2N + 4 MOLES OF A MIXTURE OF MONOCARBOXYLIC ACIDS FROM THE GROUP CONSISTING OF (A) AT LEAST 1 AND NOT MORE THAN 2N + 2 MOLES OF RCOOH wherein R is a straight chain or branched, saturated or unsaturated hydrocarbon radical containing 11 to 19 carbon atoms and (b) at least 2 and not more than 2n + 3 of HSCH.sub.2 (CH.sub.2).sub.m COOH wherein m is 0 to 1. In the present invention it is preferred to react only one acid from each of the mercapto and the long chain fatty acid group members. However, more than one acid from each group member can be reacted if desired.

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Laurel, MD, United States of America

David E Kramm